# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import datetime
import uuid

from oslo_utils import timeutils
import six
from six.moves import http_client
from testtools import matchers

from keystone.common import utils
from keystone.models import revoke_model
from keystone.tests.unit import test_v3


def _future_time_string():
    expire_delta = datetime.timedelta(seconds=1000)
    future_time = timeutils.utcnow() + expire_delta
    return utils.isotime(future_time)


class OSRevokeTests(test_v3.RestfulTestCase, test_v3.JsonHomeTestMixin):

    JSON_HOME_DATA = {
        'http://docs.openstack.org/api/openstack-identity/3/ext/OS-REVOKE/1.0/'
        'rel/events': {
            'href': '/OS-REVOKE/events',
        },
    }

    def test_get_empty_list(self):
        resp = self.get('/OS-REVOKE/events')
        self.assertEqual([], resp.json_body['events'])

    def _blank_event(self):
        return {}

    # The two values will be the same with the exception of
    # 'issued_before' which is set when the event is recorded.
    def assertReportedEventMatchesRecorded(self, event, sample, before_time):
        after_time = timeutils.utcnow()
        event_issued_before = timeutils.normalize_time(
            timeutils.parse_isotime(event['issued_before']))
        self.assertTrue(
            before_time <= event_issued_before,
            'invalid event issued_before time; %s is not later than %s.' % (
                utils.isotime(event_issued_before, subsecond=True),
                utils.isotime(before_time, subsecond=True)))
        self.assertTrue(
            event_issued_before <= after_time,
            'invalid event issued_before time; %s is not earlier than %s.' % (
                utils.isotime(event_issued_before, subsecond=True),
                utils.isotime(after_time, subsecond=True)))
        del (event['issued_before'])
        del (event['revoked_at'])
        self.assertEqual(sample, event)

    def test_revoked_list_self_url(self):
        revoked_list_url = '/OS-REVOKE/events'
        resp = self.get(revoked_list_url)
        links = resp.json_body['links']
        self.assertThat(links['self'], matchers.EndsWith(revoked_list_url))

    def test_revoked_token_in_list(self):
        audit_id = uuid.uuid4().hex
        sample = self._blank_event()
        sample['audit_id'] = six.text_type(audit_id)
        before_time = timeutils.utcnow()
        self.revoke_api.revoke_by_audit_id(audit_id)
        resp = self.get('/OS-REVOKE/events')
        events = resp.json_body['events']
        self.assertEqual(1, len(events))
        self.assertReportedEventMatchesRecorded(events[0], sample, before_time)

    def test_disabled_project_in_list(self):
        project_id = uuid.uuid4().hex
        sample = dict()
        sample['project_id'] = six.text_type(project_id)
        before_time = timeutils.utcnow()
        self.revoke_api.revoke(
            revoke_model.RevokeEvent(project_id=project_id))

        resp = self.get('/OS-REVOKE/events')
        events = resp.json_body['events']
        self.assertEqual(1, len(events))
        self.assertReportedEventMatchesRecorded(events[0], sample, before_time)

    def test_disabled_domain_in_list(self):
        domain_id = uuid.uuid4().hex
        sample = dict()
        sample['domain_id'] = six.text_type(domain_id)
        before_time = timeutils.utcnow()
        self.revoke_api.revoke(
            revoke_model.RevokeEvent(domain_id=domain_id))

        resp = self.get('/OS-REVOKE/events')
        events = resp.json_body['events']
        self.assertEqual(1, len(events))
        self.assertReportedEventMatchesRecorded(events[0], sample, before_time)

    def test_list_since_invalid(self):
        self.get('/OS-REVOKE/events?since=blah',
                 expected_status=http_client.BAD_REQUEST)

    def test_list_since_valid(self):
        resp = self.get('/OS-REVOKE/events?since=2013-02-27T18:30:59.999999Z')
        events = resp.json_body['events']
        self.assertEqual(0, len(events))

    def test_since_future_time_no_events(self):
        domain_id = uuid.uuid4().hex
        sample = dict()
        sample['domain_id'] = six.text_type(domain_id)

        self.revoke_api.revoke(
            revoke_model.RevokeEvent(domain_id=domain_id))

        resp = self.get('/OS-REVOKE/events')
        events = resp.json_body['events']
        self.assertEqual(1, len(events))

        resp = self.get('/OS-REVOKE/events?since=%s' % _future_time_string())
        events = resp.json_body['events']
        self.assertEqual([], events)

    def test_revoked_at_in_list(self):
        revoked_at = timeutils.utcnow()
        # Given or not, `revoked_at` will always be set in the backend.
        self.revoke_api.revoke(
            revoke_model.RevokeEvent(revoked_at=revoked_at))

        resp = self.get('/OS-REVOKE/events')
        events = resp.json_body['events']
        self.assertThat(events, matchers.HasLength(1))
        # Strip off the microseconds from `revoked_at`.
        self.assertTimestampEqual(utils.isotime(revoked_at),
                                  events[0]['revoked_at'])
